chore: update licensing (#733)

srl295 · web-flow · commit 9c768226e6ad · 2024-03-18T11:02:49.000-07:00
chore: update licensing - add SPDX link in LICENSE - update date in README.md - unicode-org/.github#15
diff --git a/LICENSE b/LICENSE
@@ -37,3 +37,5 @@ Except as contained in this notice, the name of a copyright holder shall
 not be used in advertising or otherwise to promote the sale, use or other
 dealings in these Data Files or Software without prior written
 authorization of the copyright holder.
+
+SPDX-License-Identifier: Unicode-3.0
